:root {
  --bg: #0a0b0f;
  --bg-card: #0f1117;
  --bg-terminal: #13141a;
  --border: rgba(99, 102, 241, 0.18);
  --cyan: #00d4ff;
  --purple: #8b5cf6;
  --green: #10b981;
  --yellow: #f59e0b;
  --red: #ef4444;
  --text: #e2e8f0;
  --text-muted: #4b5563;
  --font: 'JetBrains Mono', monospace;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--purple), var(--cyan));
  border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover { background: var(--cyan); }

* { scrollbar-width: thin; scrollbar-color: var(--purple) var(--bg); }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  min-height: 100vh;
  overflow-x: hidden;
}

#ab-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.045;
  pointer-events: none;
}

.ab-wrap {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ── Nav ── */
.ab-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0 24px;
  border-bottom: 1px solid var(--border);
}

.ab-nav__logo {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  text-decoration: none;
}
.ab-logo-brace { color: var(--purple); }
.ab-logo-name  { color: var(--cyan);   margin: 0 3px; }

.ab-nav__links { display: flex; gap: 36px; }

.ab-nav__link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  transition: color 0.2s;
}
.ab-nav__link:hover { color: var(--cyan); }
.ab-nav__link-pre { color: var(--purple); }

/* ── Language switcher ── */
.ab-lang {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 20px;
}

.ab-lang__btn {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 3px 7px;
  border-radius: 4px;
  border: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.ab-lang__btn:hover { color: var(--cyan); }

.ab-lang__btn--active {
  color: var(--cyan);
  border-color: rgba(0,212,255,.25);
  background: rgba(0,212,255,.06);
}

.ab-lang__sep {
  color: var(--text-muted);
  font-size: 0.65rem;
  opacity: 0.35;
}

/* ── Footer ── */
.ab-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0 32px;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-muted);
}
.ab-footer__r { color: var(--green); }

/* ── Section heading ── */
.ab-kw   { color: var(--purple); }
.ab-sect { color: var(--text); font-size: 1.2rem; font-weight: 700; }
.ab-cmt  { color: var(--text-muted); font-size: 0.8rem; }

/* ── Tag pill ── */
.ab-tag {
  font-size: 0.75rem;
  padding: 4px 13px;
  border-radius: 5px;
  border: 1px solid;
  letter-spacing: 0.02em;
}
.ab-tag--ruby    { color: #f87171; border-color: rgba(248,113,113,.25); background: rgba(248,113,113,.06); }
.ab-tag--rails   { color: #fb923c; border-color: rgba(251,146,60,.25);  background: rgba(251,146,60,.06);  }
.ab-tag--js      { color: #fbbf24; border-color: rgba(251,191,36,.25);  background: rgba(251,191,36,.06);  }
.ab-tag--dev     { color: var(--cyan);   border-color: rgba(0,212,255,.25);  background: rgba(0,212,255,.06);  }
.ab-tag--docker  { color: #60a5fa; border-color: rgba(96,165,250,.25);  background: rgba(96,165,250,.06);  }
.ab-tag--devops  { color: var(--green);  border-color: rgba(16,185,129,.25); background: rgba(16,185,129,.06); }
.ab-tag--nginx   { color: var(--green);  border-color: rgba(16,185,129,.25); background: rgba(16,185,129,.06); }
.ab-tag--finance { color: var(--yellow); border-color: rgba(245,158,11,.25); background: rgba(245,158,11,.06); }

/* ── Card ── */
.ab-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 26px 28px;
  text-decoration: none;
  display: block;
  position: relative;
  overflow: hidden;
  transition: border-color .25s, box-shadow .25s, transform .25s;
}

.ab-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0;
  width: 3px; height: 100%;
  background: linear-gradient(180deg, var(--purple), var(--cyan));
  opacity: 0;
  transition: opacity .25s;
}

.ab-card:hover {
  border-color: rgba(99,102,241,.45);
  box-shadow: 0 0 36px rgba(99,102,241,.1);
  transform: translateX(5px);
}
.ab-card:hover::before { opacity: 1; }

.ab-card__meta {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-bottom: 10px;
}

.ab-card__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.5;
  color: var(--text);
}

.ab-card__excerpt {
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.75;
  margin-bottom: 18px;
}

.ab-card__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ab-card__tags { display: flex; gap: 8px; flex-wrap: wrap; }

.ab-card__link {
  color: var(--purple);
  font-size: 0.8rem;
  white-space: nowrap;
  transition: color .2s;
}
.ab-card:hover .ab-card__link { color: var(--cyan); }

.ab-arrow {
  display: inline-block;
  transition: transform .2s;
}
.ab-card:hover .ab-arrow { transform: translateX(4px); }

/* ── Tools section ── */
.ab-tools { padding: 40px 0 72px; }

.ab-tools__hd {
  margin-bottom: 32px;
}

.ab-tools__grid {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.ab-tools__more {
  margin-top: 28px;
  display: flex;
  justify-content: center;
}

/* ── Button ── */
.ab-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  text-decoration: none;
  font-family: var(--font);
  font-size: 0.85rem;
  transition: border-color .2s, color .2s, background .2s;
}
.ab-btn:hover {
  border-color: rgba(0,212,255,.45);
  color: var(--cyan);
  background: rgba(0,212,255,.06);
}
.ab-btn:hover .ab-arrow { transform: translateX(4px); }

/* ── Empty state ── */
.ab-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 64px 0;
  color: var(--text-muted);
}

.ab-empty__icon {
  font-size: 2rem;
  opacity: 0.3;
}

.ab-empty__text {
  font-size: 0.9rem;
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .ab-wrap { padding: 0 16px; }

  .ab-nav {
    flex-wrap: wrap;
    gap: 0;
    padding: 18px 0 16px;
  }
  .ab-nav__logo { order: 1; }
  .ab-lang { order: 2; margin-left: auto; }
  .ab-nav__links {
    order: 3;
    width: 100%;
    justify-content: center;
    gap: 18px;
    padding-top: 14px;
    margin-top: 14px;
    border-top: 1px solid var(--border);
  }

  .ab-card { padding: 20px; }
  .ab-card:hover { transform: none; }

  .ab-footer { flex-direction: column; gap: 8px; text-align: center; }
}